Deconcentrator



C. G. HAWLEY DECONCENTRATOR May s, 1928.

Filed May 4. 1925 INVENTOR Patented May 8, 1928.

UNITED STATES.

a 1,668,904 aPATEN T J-OFFIC E.

CHARLES GILBERT HAWLEY, OF CHICAGO, ILLI NOIS, ASSIGNOR T CENTRIFIX COB-' PORATION, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

DECONGENTBATOR.

Application filed May 4, 1925. Serial No. 27,850.

My invention has to do with the art of boiler Operation. Specifically it is concerned with a method and apparatus for continuously ridding boilers and other evaporators of various kinds of the foreign substances lem is extremely simple and will be readily understood on reference to theaccoi'npanying drawings and the following detailed description. o

In said drawings, Fig. 1 illustrates an or dinary water tube boiler equipped with de* concentrating apparatus embodying my invention; Fig. 2 is an enlarged verticalsection of the u per drum and the centrifugal. unit which p ays an important part in this system; and Fig. 3 is a horizontal section on the line 33 of Fig. 2.

The typical boiler of Fig. 1 comprises a setting or fire chamber 2, a bottom drum 3, one or several top drums 4, and a large number of .tubes 5 connecting the drums. 'The feed water is supplied to the boiler through either the bottom drum orthe top drunnas usual. The steam or other vapor leaves the boiler through the outlet nozzle 6.

A boiler water circulating pipe or loop 7 is arranged outside the setting or wall 2, with its upper end connected with the lower part of the upper drum and with its lower end connected to the bottom drum. This pipe is constantly open and is occupied by a solid column of boiler water, so much 1 heavier than the columns of mixed water andsteam in the tubes 5 that a rapid downward flow is constantly maintained inthe pipe 7. I

The upper'end of the pipe 7-is joined to the end of the drum 4 by a coupling 8 which on the inside of the drum, turns upward to form the elbow 9. This elbow, as shown, opens some little distance below the low water line 10 of the boiler. The top of the elbow preferably bears a circular collarll. The part 9 is enclosed by a casing arranged directly within the fire-protectedend of the boiler drum, that is. in the partwhich extends beyond the wall 2. The casing. as best shown in Figs. 2 and 3, comprises the vertical-wall 12 and the top plate 12, having The herein presented solution of the prob- 7 above the opening 9.

their edges attached to the walls of the drum. The top plate is positioned above the level of the'col-lar 11 and contains a hole 13 directly above the collar and central opening 9 of the elbow 9. On the plate 12' is a tangential tuyere ring a which comprises the top or end disk 14 and a circumferential series of operatively overlapping tangential tuyere blades15, the latter hav ing their lower ends fastened to the part 12 at the margin of the hole 13. The internal diameter of the tuyere ring a is greater than a that of the opening 9'. A suitably valved blow-off pipe 16 leads from the bottom of the cavity 6 within the casing 12, 12.

As previously explained, when evaporation is going on, there is a constant flow of water downward through the pipe 7 (whether or not the latter is insulated) and to reach the pipe 7 the water from the upper drum must pass through the tangential tuyeres a of the tuyere ring a. The aggregate area of these tuyeres is considerably greater than the area of the circulating pipe 7 and the flow through the tuyeres is rapid. Due to its manner of entrance the water takes on a rapid whirling motion within the tuyere ring a and within the circumferential space 0 (between the parts 11 and 12) This whirling or swirling of the water results in centrifugally separating the heavier substances, and, while the cleared water passes freely downward through the conduits 9 and 7, the heavier substances are thus removed from the region of the outlet v9 and are collected in the cavity Z). The occasional blowing off of the contents of that cavity serves to keep the boiler substantially clean. 7 c

As will now be apparent, this invention performs thecombined functions ofa skimmer and a deeoncentrator, with the advantage that practically no boiler water is wasted. Various practical modifications will suggest themselves to those skilled in the art and it is to be understood that the invention is notlimited to the exemplary strucand forming the entrance to said collecting pocket, an outlet centrally beneath said tuyere to receive the clear Water therefrom, a pipe leading from said outlet back into the lower part of the boiler, and means for blowing the sediment from the lower part of said pocket.

2. A steam boiler drum and its setting, in combination with a sediment separator having a sediinent pocket and positioned within the boiler drum directly beneath the low water level therein, said separator having clear water and eedinient outlet-s both below said level and both communicating with said pocket, a blow-off connection joined to the, sediment outlet, and a recirculating connection leading from the clear water outlet of the separator to a lower part of the boiler.

In testimony whereof I have hereunto set my hand this 30th day of April A. D. 1925.

CHARLES GILBERT I-L UVLEY. 

